This application demonstrates the use of 3D sound. It loads three sounds:
loop3.wav is an ambient background sound and loop1.wav and loop2.wav are
point sounds. The two point sounds can be switched on and off use AWT
buttons. The user can navigate around the scene using the keyboard.

import java.awt.BorderLayout;import java.awt.Button;import java.awt.Frame;import java.awt.Panel;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.media.j3d.AmbientLight;import javax.media.j3d.Appearance;import javax.media.j3d.BackgroundSound;import javax.media.j3d.BoundingLeaf;import javax.media.j3d.BoundingSphere;import javax.media.j3d.BranchGroup;import javax.media.j3d.Canvas3D;import javax.media.j3d.DirectionalLight;import javax.media.j3d.Locale;import javax.media.j3d.Material;import javax.media.j3d.MediaContainer;import javax.media.j3d.PhysicalBody;import javax.media.j3d.PhysicalEnvironment;import javax.media.j3d.PointSound;import javax.media.j3d.Transform3D;import javax.media.j3d.TransformGroup;import javax.media.j3d.View;import javax.media.j3d.ViewPlatform;import javax.media.j3d.VirtualUniverse;import javax.vecmath.Color3f;import javax.vecmath.Point2f;import javax.vecmath.Point3d;import javax.vecmath.Point3f;import javax.vecmath.Vector3f;import com.sun.j3d.audioengines.javasound.JavaSoundMixer;import com.sun.j3d.utils.behaviors.keyboard.KeyNavigatorBehavior;import com.sun.j3d.utils.geometry.Box;/*** This application demonstrates the use of 3D sound. It loads three sounds:* loop3.wav is an ambient background sound and loop1.wav and loop2.wav are* point sounds. The two point sounds can be switched on and off use AWT* buttons. The user can navigate around the scene using the keyboard.* * @author I.J.Palmer* @version 1.0*/public class SimpleSounds extends Frame implements ActionListener {protected Canvas3D myCanvas3D = new Canvas3D(null);/** The exit button to quit the application */protected Button exitButton = new Button("Exit");/** The button to switch on and off the first sound */protected Button sound1Button = new Button("Sound 1");/** The button to switch on and off the second sound */protected Button sound2Button = new Button("Sound 2");protected BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0,0.0), 10000.0);//Create the two point soundsPointSound sound1 = new PointSound();PointSound sound2 = new PointSound();/*** Build the view branch of the scene graph. In this case a key navigation* utility object is created and associated with the view transform so that* the view can be changed via the keyboard.* * @return BranchGroup that is the root of the view branch*/protected BranchGroup buildViewBranch(Canvas3D c) {BranchGroup viewBranch = new BranchGroup();Transform3D viewXfm = new Transform3D();viewXfm.set(new Vector3f(0.0f, 0.0f, 30.0f));TransformGroup viewXfmGroup = new TransformGroup(viewXfm);viewXfmGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);viewXfmGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);ViewPlatform myViewPlatform = new ViewPlatform();BoundingSphere movingBounds = new BoundingSphere(new Point3d(0.0, 0.0,0.0), 100.0);BoundingLeaf boundLeaf = new BoundingLeaf(movingBounds);PhysicalBody myBody = new PhysicalBody();PhysicalEnvironment myEnvironment = new PhysicalEnvironment();viewXfmGroup.addChild(myViewPlatform);viewBranch.addChild(viewXfmGroup);View myView = new View();myView.addCanvas3D(c);myView.attachViewPlatform(myViewPlatform);myView.setPhysicalBody(myBody);myView.setPhysicalEnvironment(myEnvironment);KeyNavigatorBehavior keyNav = new KeyNavigatorBehavior(viewXfmGroup);keyNav.setSchedulingBounds(movingBounds);viewBranch.addChild(keyNav);//Create a sounds mixer to use our sounds with//and initialise itJavaSoundMixer myMixer = new JavaSoundMixer(myEnvironment);myMixer.initialize();return viewBranch;}/*** Add some lights to the scene graph* * @param b* BranchGroup that the lights are added to*/protected void addLights(BranchGroup b) {Color3f ambLightColour = new Color3f(0.5f, 0.5f, 0.5f);AmbientLight ambLight = new AmbientLight(ambLightColour);ambLight.setInfluencingBounds(bounds);Color3f dirLightColour = new Color3f(1.0f, 1.0f, 1.0f);Vector3f dirLightDir = new Vector3f(-1.0f, -1.0f, -1.0f);DirectionalLight dirLight = new DirectionalLight(dirLightColour,dirLightDir);dirLight.setInfluencingBounds(bounds);b.addChild(ambLight);b.addChild(dirLight);}/*** This adds a continuous background sound to the branch group.* * @param b* BranchGroup to add the sound to.* @param soundFile* String that is the name of the sound file.*/protected void addBackgroundSound(BranchGroup b, String soundFile) {//Create a media container to load the fileMediaContainer droneContainer = new MediaContainer(soundFile);//Create the background sound from the media containerBackgroundSound drone = new BackgroundSound(droneContainer, 1.0f);//Activate the sounddrone.setSchedulingBounds(bounds);drone.setEnable(true);//Set the sound to loop foreverdrone.setLoop(BackgroundSound.INFINITE_LOOPS);//Add it to the groupb.addChild(drone);}/*** Add a sound to the transform group. This takes a point sound object and* loads into it a sounds from a given file. The edge of the sound's extent* is also defined in a parameter.* * @param tg* TransformGroup that the sound is to be added to* @param sound* PointSound to be used* @param soundFile* String that is the name of the sound file to be loaded* @param edge* float that represents the sound's maximum extent*/protected void addObjectSound(TransformGroup tg, PointSound sound,String soundFile, float edge) {//First we get the current transform so that we can//position the sound in the same placeTransform3D objXfm = new Transform3D();Vector3f objPosition = new Vector3f();tg.getTransform(objXfm);objXfm.get(objPosition);//Create the media container to load the soundMediaContainer soundContainer = new MediaContainer(soundFile);//Use the loaded data in the soundsound.setSoundData(soundContainer);sound.setInitialGain(1.0f);//Set the position to that of the given transformsound.setPosition(new Point3f(objPosition));//Allow use to switch the sound on and offsound.setCapability(PointSound.ALLOW_ENABLE_READ);sound.setCapability(PointSound.ALLOW_ENABLE_WRITE);sound.setSchedulingBounds(bounds);//Set it off to start withsound.setEnable(false);//Set it to loop foreversound.setLoop(BackgroundSound.INFINITE_LOOPS);//Use the edge value to set to extent of the soundPoint2f[] attenuation = { new Point2f(0.0f, 1.0f),new Point2f(edge, 0.1f) };sound.setDistanceGain(attenuation);//Add the sound to the transform grouptg.addChild(sound);}protected BranchGroup buildContentBranch() {//Create the appearanceAppearance app = new Appearance();Color3f ambientColour = new Color3f(1.0f, 0.0f, 0.0f);Color3f emissiveColour = new Color3f(0.0f, 0.0f, 0.0f);Color3f specularColour = new Color3f(1.0f, 1.0f, 1.0f);Color3f diffuseColour = new Color3f(1.0f, 0.0f, 0.0f);float shininess = 20.0f;app.setMaterial(new Material(ambientColour, emissiveColour,diffuseColour, specularColour, shininess));//Make the cubeBox myCube = new Box(1.0f, 1.0f, 1.0f, app);TransformGroup cubeGroup = new TransformGroup();BranchGroup contentBranch = new BranchGroup();addLights(contentBranch);addObjectSound(cubeGroup, sound1, new String("file:./loop1.wav"), 10.0f);addObjectSound(cubeGroup, sound2, new String("file:./loop2.wav"), 20.0f);addBackgroundSound(contentBranch, new String("file:./loop3.wav"));cubeGroup.addChild(myCube);contentBranch.addChild(cubeGroup);return contentBranch;}public void actionPerformed(ActionEvent e) {if (e.getSource() == exitButton) {dispose();System.exit(0);} else if (e.getSource() == sound1Button) {if (sound1.getEnable())sound1.setEnable(false);elsesound1.setEnable(true);} else if (e.getSource() == sound2Button) {sound2.setEnable(!sound2.getEnable());}}public SimpleSounds() {VirtualUniverse myUniverse = new VirtualUniverse();Locale myLocale = new Locale(myUniverse);// buildUniverse(myCanvas3D);myLocale.addBranchGraph(buildContentBranch());myLocale.addBranchGraph(buildViewBranch(myCanvas3D));setTitle("SimpleSounds");setSize(400, 400);setLayout(new BorderLayout());Panel bottom = new Panel();bottom.add(sound1Button);bottom.add(sound2Button);bottom.add(exitButton);add(BorderLayout.CENTER, myCanvas3D);add(BorderLayout.SOUTH, bottom);exitButton.addActionListener(this);sound1Button.addActionListener(this);sound2Button.addActionListener(this);setVisible(true);}public static void main(String[] args) {SimpleSounds sw = new SimpleSounds();}}